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首页> 外文期刊>Environmental Science & Technology >Leaded-Gasoline Additives Still Contaminate Groundwater
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Leaded-Gasoline Additives Still Contaminate Groundwater

机译：含铅汽油添加剂仍污染地下水

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摘要

Much recent attention has focused on the gasoline additive methyl tert-butyl ether (MTBE), which is mobile and persistent in the environment. As demonstrated in several highly publicized cases, the additive has contaminated public water supplies. Hundreds of millions of dollars have been spent to address the MTBE problem, but two other gasoline additives that are far more toxic have been mostly overlooked. The volatile organic chemicals 1,2-dibromoethane (ethylene dibromide; EDB) and 1,2-dichloroethane (DCA) were ubiquitous components of lead-based antiknock additive mixtures, which were used from the 1920s through the late 1980s to increase gasoline octane ratings. EDB and DCA are probable human carcinogens with federal maximum contaminant levels (MCLs) of 0.05 and 5 μg/L, respectively. Lead is no longer used in gasoline in the U.S., but EDB and DCA still linger in the environment.
机译：最近的许多注意力都集中在汽油添加剂甲基叔丁基醚（MTBE）上，它在环境中可移动且持久。正如在一些广为宣传的案例中所表明的那样，该添加剂已污染了公共供水。为了解决MTBE问题，已经花费了数亿美元，但是大多数其他两种毒性更大的汽油添加剂却被忽略了。挥发性有机化学物质1,2-二溴乙烷（EDB）和1,2-二氯乙烷（DCA）是铅基抗爆添加剂混合物的普遍成分，从1920年代到1980年代后期一直用于提高汽油辛烷值。 EDB和DCA可能是人类致癌物，其联邦最大污染物水平（MCL）分别为0.05和5μg/ L。在美国，汽油已不再使用铅，但EDB和DCA仍在环境中徘徊。

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